I have done 100's of apps with-out striping and low and behold I had some problems with a couple of immature lawns recently and was wondering why it happened. The striping that occurred happened on new lawns about a year old. Both were weed infested as well. After applying a granular with dimension narrow bands of dark green popped up. The 3ft. bands are about 20 ft. apart. I was laying down fert and spraying at the same time so my spacing was pretty tight. My thinking is that my Z was tossing a bit too much fert to the right. That would explain the wide spacing of the bands. I noticed that I have had this problem only when using granular with Dimension. I tried placing the comb all the way back and it still seems to throw more fert to the right than the left due to the clockwise rotation of the impeller. I did a property right next to one that striped and it turned out perfect. I had the same spacing and calibration on the striped property. The only difference was that it was an established lawn while the other was not. Its kind of embarrassing that I striped these lawns as that is something I have not done since I was a noob and I only did that a few times back then. Has anyone one else had a similar problem with their Z throwing down a bit more fert to the right when using Dimension? Do you think this is the reason for the striping? I am sorry I don't have any pics but if you have had any similar experiences please share them. Thanks! EDIT ~ I'll try to take some pics tomorrow and post them.